Aggregate SQL query grouping by month

Question

I have a database of Transactions (Access 2007) that are recorded in hourly, daily and monthly intervals. I would like to view them in a meaningful way (instead of hour-by-

Answer 1

So as to Avoid conversion to strings, concatenations and conversion back to dates, use DATEADD() and DATEDIFF().

SELECT
  DATEADD("m", DATEDIFF("m", 0, TransactionDate), 0) AS TransactionMonth,
  SUM(Usage)                                         AS TotalUsage
FROM
  yourTable
WHERE
  TransactionDate BETWEEN  AND 
GROUP BY
  DATEADD("m", DATEDIFF("m", 0, TransactionDate), 0)
ORDER BY
  DATEADD("m", DATEDIFF("m", 0, TransactionDate), 0)